[filmscanners] Re: IV ED dynamic range

["Anthony Atkielski" <anthony@atkielski.com>]

Austin writes:

> That's not how scanners work.  They ALL DO
> SCAN at the highest bit depth they have...ALWAYS.

Photoshop doesn't care how scanners work.  You must have all the bits
available in Photoshop, or the depth of scanning in the scanner is
irrelevant.

> The 8 bit file will contain the FULL range
> available on the film, if the setpoints
> are set correctly.

If you need to expand the shadows between levels 20 and 30 to fill the
histogram, it won't matter what the eight-bit file contains ... you need a
16-bit file.

> When you choose 8 bit data, you set the setpoints,
> and the tonal curves (which can be used to expand
> the highlights and shadows as you say above), and
> the scanner does the tonal curve adjustment to the
> high bit mode ...

I wasn't discussing the scanner settings, I was discussing Photoshop.  I
never play with scanner settings at all, as it is a tremendous waste of time
to reset them for each scan.  It's much easier to get the deepest scan I can
in one pass, and then fix everything in Photoshop, and the results are
identical.



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